Vector Quark Model and B to X_s gamma Decay

Abstract

We study the $B$ meson radiative decay $B\to X_s\gamma$ in the vector quark model. Deviation from the Standard Model arises from the non-unitarity of the charged current KM matrix and related new FCNC interactions. We establish the relation between the non-unitarity of charged current mixing matrix and the mixing among the vector quark and the ordinary quarks. We also make explicitly the close connection between this non-unitarity and the flavor changing neutral currents. The complete calculation including leading logarithmic QCD correction is carefully carried out. Using the most updated data and the NLO theoretical calculation, the branching fraction of the observed $B$ meson radiative decay places a limit on the mixing angles as stringent as that from the process $B\to X\mu \bar{\mu }$.

Published version including detailed QCD evolution

References in corpus (5)

• QCD Anatomy of B -> X_s gamma Decays
• Corrections of Order ${\Lambda }_{QCD}^2/m_c^2$ to Inclusive Rare B Decays
• Comment on nonperturbative effects in $B\to X_s\gamma$
• On the Scale Uncertainties in the $B\to X_s\gamma$ Decay
• Comment On Nonperturbative O(1/m_c^2) Corrections to B -> X_s gamma

Cited by in corpus (15)

• Effects of mixing with quark singlets
• Constraining models with vector-like fermions from FCNC in K and B physics
• Rare dileptonic decays of Λ_b in a quark model
• D-\bar D mixing and rare D decays in the Littlest Higgs model with non-unitarity matrix
• Flavor and CP violating Z exchange and the rate asymmetry in B --> phi K_S
• Non-unitarity of CKM matrix from the vector singlet quark mixing and neutron electric dipole moment
• Constraints on the quark mixing matrix with vector-like quarks
• Lepton polarization asymmetries for FCNC decays of the ${\Lambda }_b$ baryon
• Inclusive dileptonic rare B decays with an extra generation of vector-like quarks
• Direct CP Asymmetry of B -> X_d,s γin a model with Vector quarks
• Flavor-changing interactions with singlet quarks and their implications for the LHC
• Extra Dimensions, Isosinglet Charged Leptons and Neutrino Factories
• Effective theory analysis for vector-like quark model
• Large effects on $\BsBs$ mixing by vector-like quarks
• b \to ss\bar{d}$ in a Vector Quark Model